You need to persevere so that when you have done the will of God, you will receive what he has promised.
References for Hebrews 10:36
For, “In just a little while, he who is coming will come and will not delay.”
References for Hebrews 10:37
And, “But my righteous one will live by faith. And I take no pleasure in the one who shrinks back.”
References for Hebrews 10:38
But we do not belong to those who shrink back and are destroyed, but to those who have faith and are saved.